• Carboniferous of United States (19: Alabama collections)

• Givetian of France (1)

• Devonian of Australia (5), Austria (1), Canada (9: New Brunswick, Northwest Territories, Ontario), Czechia (6), France (1), Kyrgyzstan (1), United States (11: California, Maryland, Michigan, Nevada, New York, Ohio)

• Niagaran of United States (1: New York)

• Silurian to Devonian of Australia (1)

• Silurian of Canada (42: Manitoba, Northwest Territories, Nova Scotia, Nunavut, Ontario, Quebec, Québec), China (13), Czechia (9), Estonia (2), Greenland (1), Norway (1), the Russian Federation (11), Sweden (6), Ukraine (3), the United Kingdom (3), United States (39: Alaska, California, Maryland, Michigan, New York, Ohio, Virginia, West Virginia, Wisconsin)

• Whiterockian of United States (2: California, Minnesota)

• Chazyan of United States (1: New York)

• Arenig of Australia (1), China (8), United States (2: Montana, Oklahoma)

• Arenigian of United States (1: Virginia)

• Ordovician of Australia (3), Canada (82: Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (9), Czechia (1), Estonia (7), Greenland (2), Norway (4), Svalbard and Jan Mayen (2), the United Kingdom (11), United States (190: Alaska, Arkansas, California, Georgia, Illinois, Iowa, Indiana, Iowa, Kentucky, Maryland, Michigan, Minnesota, Missouri, Montana, New York, Ohio, Oklahoma, Tennessee, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming)

Total: 512 collections including 692 occurrences